# Example of a function you could place in .bashrc (or similar) showing synchronised input to multiple panes in tmux.

function multi_ssh
{
    tmux new-session \; \
        split-window -h \; \
        select-pane -t 0 \; \
        send-keys 'ssh user1@server1' C-m \; \
        select-pane -t 1 \; \
        send-keys 'ssh user2@server2' C-m \; \
        setw synchronize-panes \;
}

# This will give two panes, each one ssh'd into a different server (we've assumed keys setup for auth), and with anything
#  you now type being entered into BOTH panes simultaneously.